Forming method for fin-type field effect transistor
A fin-type field effect transistor and fin technology are applied in the direction of electrical components, semiconductor/solid-state device manufacturing, circuits, etc., to achieve the effect of improving electrical performance and good performance
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[0032] It can be known from the background technology that the performance of the fin-type FET formed in the prior art needs to be further improved, especially the electrical performance of the NMOS fin-type FET is poor.
[0033] After analysis, the formation process of the NMOS fin-type field effect transistor includes the steps: forming a mask sidewall on the sidewall of the fin in the NMOS region; and etching and removing the fins of the thickness on both sides of the gate structure in the NMOS region. An N-zone groove is formed in the part; an N-type doped epitaxial layer filling the N-zone groove is formed. In order to limit the morphology and volume of the formed N region doped epitaxial layer, when the fins on both sides of the gate structure in the NMOS region are etched and removed, the mask sidewalls on the sidewalls of the fins are retained, so that the formation The two opposite sidewalls of the groove in the N region are mask sidewalls; in the process of forming the ...
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